Ian Poulter has slipped back to one under with a bogey on 12.

Meanwhile Miguel Angel Jimenez is holding steady at three under, parring the 17th.

Irish golfer Shane Lowry on Twitter:, external I think Jimenez would be the most popular winner of a major for a long time if he won. #Legend

Matt Kuchar has made a good start to his third round with birdies at the second and third to take him to two under and joint eighth.

Image source, Reuters

Lovely strides from Louis Oosthuizen's fans. Is that a reworking of the South African flag? Either that of the sort of British Airways tailfin that Baroness Thatcher would take exception to., external

Miguel Angel Jimenez is prowling the back nine like the golfing big cat that he is. The Spaniard picks up a shot with a birdie on 16, that is three over his last four holes, and he is three under.

Ian Poulter makes a decent fist of his bump and run on 12, dribbling it down the slope but it pulls up a good six feet short and that's a testy one for par.

Lee Westwood is still chugging on in solid fashion. He is level par through four.

Image source, Getty Images

We were braced for a splash. Ian Poulter hangs his head after hitting his tee shot to 12, but the water never arrives. Instead he gets lucky as the ball hops about between bunkers at the back of the green, coming to rest on turf. Lucky, lucky, lucky.

Jamie Donaldson drops a shot on the opening hole to slip to level par.

-7 B Watson (US); -4 Senden (US); -3 Bjorn (Den), Blixt (Swe), Scott (Aus), Spieth (US).

Selected others: -2: Jimenez (Spa) after 15, Poulter (Eng) 11; -1 Gallacher (Sco), Donaldson (Wal), Westwood (Eng) 4; +1 Rose (Eng) 8; +3 McIlroy (NI)

Ian Poulter pulls a par out of the fire at 11, judging a curling uphill putt to perfection. He stays at two under.

Rory McIlroy speaks to BBC Sport after his one under round of 71: "I enjoyed the round, but being first out on a Saturday is not an experience I really want again. The course was fiery from the start and the guys will find it pretty interesting this afternoon.

"You don't get much from playing a round like that, it was nice to see a couple of putts drop on the back nine, I shot under par, I felt I played well enough to go lower but the way it's set up its hard to go really low out there. Anything around 70 or 69 is a really good effort.

"I don't think 11 and 12 will play as hard as they did in the first couple of days. There are some tricky pins on the front nine - the first hole for example. Some pins are very tough to get at."

Justin Rose needs to have a stormer today to be in contention for Sunday's prize-giving ceremony.

The Englishman is back to one under for the day, one over for the tournament as he picks up a shot on seven.

Image source, Getty Images

Russell Moore:, external Masters Saturday primed for someone to shoot 65 or under. Ok, I'll admit it - now I'm missing Tiger!

What went rocketing up the leaderboard, must come down it seems. Gary Woodland burned bright but is now fading away. Another bogey, this time on 14 takes him back to one under. He was three shots better off and into a share of second earlier in his round.

Ian Poulter, rocking pistachio and white today, is keeping as cool as his outfit. Birdies on nine and ten take him to two under.

Rickie Fowler has let us, his family and most importantly himself down with his third round outfit. Plain old grey for the young American today. What was he thinking?

Still plenty of chances out there.

Miguel Angel Jimenez and Brandt Snedeker pick up shots on 14 and three respectively and both are up to two under.

I think this course is ripe for someone to slice and dice through the competition.

Here's a look at the best of what the American golf writers are posting on social media.

The Golf Channel's Jason Sobel, external points out that since 1985, only one first-round leader has won at Augusta, but that since 2006, every winner was inside the top-10 after the first round. "So be close. But not too close," in his words.

USA Today's Chris Chase, external notes that in the past 17 years there has only been one major weekend without Tiger Woods or Phil Mickelson, which was The Open in 2009, one of the most memorable majors in living memory for 59-year-old Tom Watson's title challenge which came unstuck on the 72nd hole.

Gary Woodland gets back onboard the birdie train - he was driver, guard and ticket collector on the front nine - with a tap-in on 13. He is back to two under.

Wales' Jamie Donaldson and Scotland's Stephen Gallacher, the two under-radar Britons furtherest up the leaderboard, are about to get their rounds underway. Both tee off on one under.